I like B8 as well. But I'm just the programmer[]/w3timages/icons/wink.gif[/]. If everyone can agree on a certain design then I've got no problems making the change. The different color for the subject can be set by the .subjecttable class that already exists in the stylesheet for those that don't like the extra color.
I think this type of change would accomplish a couple of things, it would work well for those with narrow screen resolutions that don't like the side format and it keeps the options grouped nicely.
I'm pretty much done with the main control panel options so I can work on making this change for the next release but before a change this significant I'd really like to get more feedback from as many users as possible.